Refill unit for a writing instrument
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United States of America Patent
Stats
-
May 23, 1995
Grant Date -
N/A
app pub date -
Nov 30, 1993
filing date -
Jun 14, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A refill unit (1) for a writing instrument has a writing tip (5) at one end and a ratchet mechanism (7) at the other end through the use of which the unit (1) can be turned and selectively extended from and retracted into the writing instrument. The ratchet mechanism (7) is rotatable about the longitudinal axis of the unit with respect to the writing tip (5). Each time the refill unit (1) is extended from or retracted into the writing instrument, the tip (5) rotates by a substantially random amount which ensures a more even distribution of wear on the writing tip (5).
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